MOT Advisory vs Fail: What's the Difference?

25 March 2026 · 4 min read min read

What an Advisory Means

An advisory is a note on your MOT certificate flagging something that does not yet fail the test but is worth keeping an eye on — for example, brake pads getting low, or tyre tread approaching the legal limit. Your car passes the MOT with advisories on record.

Advisories exist to give you a heads-up before something becomes a problem, not to catch you out. They are worth taking seriously, because most items that appear as an advisory this year are the ones that fail next year if left unaddressed.

What a Fail Means

A fail means the car does not meet the legal minimum standard on at least one item — for example, tyres below the legal tread depth, a cracked windscreen in the driver's line of sight, or non-working lights. Your MOT certificate is not issued until the faults are fixed and the car is retested.

Fails are listed with a severity marker — dangerous, major, or minor — so you know exactly what needs addressing and how urgently, rather than a single blanket "fail" with no further detail.

Can You Drive on an Advisory

Yes — an advisory does not affect your MOT pass, and you can legally drive with advisories on record. The exception is if the underlying issue is also, independently, illegal to drive with, such as tyre tread genuinely below the legal limit rather than just approaching it.

A dangerous or major fail is different: the car should not be driven until it is fixed, and doing so risks a fine as well as being unsafe.

How We Handle Both at Millfields

When we test your car in Bilston, we explain every advisory and fail in plain English, with no pressure to fix everything on the spot. You decide what to book in and when, based on honest priority — what is safety-critical now versus what can be planned for.

We are a DVSA-authorised MOT test centre, so testing and any repairs can happen under one roof. Call us on 01902 492116 or book online for your MOT.

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Need help with your car?

Call Millfields Auto Services for clear advice and a fast booking.

Call 01902 492116